Mapping Every Barrera Gap on the Encierro Route

Barreras are not scenery on the encierro route. They are structures that determine how you enter the route, where you can exit in an emergency, and what options are available to you when the run begins. A barrera is not a barrier in the English sense of a wall that blocks movement. A barrera is a temporary metal framework that creates lanes, channels, and controlled exits along the encierro route. Okdiario details the official encierro regulations, including fines for misuse of the barreras during the run.

The barreras are constructed and installed by city workers the night before the run, and they are removed immediately afterward. They are moved and reconfigured several times per year as needed. They are not permanent features. But during the encierro itself, they are among the most important structures on the route. If you do not understand the barrera system, you do not understand how the encierro works.

Barreras serve three functions: they create channels that direct the movement of both bulls and runners, they provide protection from impacts with walls or other runners, and they offer escape routes when a runner needs to exit. For first-timers, understanding these three functions is the foundation of safe participation.

How Barreras Channel Movement

The encierro route is 875 meters long and passes through the medieval streets of Pamplona’s Old City. These streets were not designed for a thousand people to move through them simultaneously while six large animals are also using them. The barreras create a system that imposes order on this chaos.

In Santo Domingo, the steepest section of the route, the barreras create a single file passage that forces runners upward rather than allowing them to pool at the bottom. At the turn from Santo Domingo into Mercaderes, the barreras channel the flow so that runners are funneled toward the turn rather than trying to go straight and hitting a wall. On Estafeta, the longest straight section, the barreras create multiple lanes that allow runners to spread laterally rather than compressing forward.

Without the barreras, the route would become a series of bottlenecks where runners cluster into immobile masses. The bulls would encounter these clusters and the resulting incidents would be far more severe. The barreras work like a traffic management system for both runners and animals.

According to reports from sanfermines.net, the barrera system is reviewed and adjusted annually. “The barreras are placed strategically at corners, bottlenecks, and dangerous sections.” This suggests that the city continuously evaluates where the system needs improvement.

Barrera Gaps and Emergency Exits

Barreras are not continuous. They have gaps. These gaps exist for three reasons: to allow runners to enter and exit the route, to allow the bulls to follow the runners, and to provide escape routes for runners in distress.

The main entry point to the encierro is at Santo Domingo, where the corral gates open and both bulls and the initial runners surge forward. The barrera system begins above this point, forcing the flow into a narrow channel that runs uphill. But runners continue to enter from doorways and side streets all along Santo Domingo as the run progresses. The barreras have gaps to accommodate this ongoing entry.

Exit gaps are critical. A runner who is exhausted, injured, or panicked needs to be able to leave the run route safely. Barreras have designated exit gaps where runners can step through and move to the side of the route without becoming an obstacle to the runners and bulls still moving. These gaps are positioned strategically:

At Santo Domingo, the main exit gaps are on the left side, where the street widens and the steepness decreases. A runner who cannot continue uphill can step left, exit the run, and observe from the side. At the top of Santo Domingo, where Mercaderes begins, gaps provide exits to the left. On Estafeta, multiple gaps exist because the street is wider and allows for more options. Near the bullring, gaps exist on both sides because the run is ending and many runners are exiting to avoid the final crush into the arena.

The Barrera Map

Understanding specific barrera locations can improve your run experience significantly. Here is a section-by-section breakdown:

Santo Domingo Barreras

Santo Domingo is a narrow, steep street. The barreras create a single-file passage that directs runners upward. Entry points are on the right side where runners can join the flow. Exit points are primarily on the left side, where the street begins to widen. At the top of Santo Domingo, before the turn onto Mercaderes, a major exit gap exists on the left.

“The barreras in Santo Domingo are placed to prevent runners from clustering at the bottom of the hill,” according to sanfermines.net safety guidelines. This is critical because the steep grade means that runners who stop will be pressed forward by runners behind them, creating dangerous compression.

Mercaderes and the Curva

Mercaderes is a short section that transitions into La Curva de Estafeta, a dangerous right-angle turn. The barreras here are positioned to funnel runners toward the turn rather than allowing them to continue straight and crash into a wall. The barrera system at the turn prevents runners from being pushed against the building facade where they would be trapped.

Exit gaps exist at the beginning of Mercaderes on the left, and before the turn into Estafeta on the right. These gaps allow runners who are uncertain about navigating the turn to exit safely.

Estafeta Barreras

Estafeta is roughly 300 meters of straight, downhill movement. This is where the bulls can move most freely, and it is the section where the most spectators gather because they can see the entire section without obstruction. The barreras here create lateral lanes rather than a narrow passage.

The standard configuration is two or three parallel lanes, separated by barreras. This allows runners to spread laterally, reducing the density in any single lane. Exit gaps exist at regular intervals on both sides, allowing runners to exit at any point if needed.

Importantly, not every section of Estafeta has barreras on both sides. Much of Estafeta is flanked by building facades rather than permanent barriers, and the city chooses where to place temporary barreras based on crowd control needs for that year.

La Telefonica and Final Section

After Estafeta, the route passes through La Telefonica, a narrow section that leads toward the bullring. The barreras here channel the final push of runners toward the arena. Exit gaps are fewer because the run is nearly complete. Most runners continue into the bullring rather than exiting at this point.

Reading Barreras During the Run

Understanding the barrera system theoretically is useful. Understanding how to use it during the run is essential. A runner who knows the location of exit gaps can position themselves nearby and exit safely if needed. A runner who understands how barreras channel movement can anticipate where bottlenecks will form and avoid them.

The barreras are visible. They are metallic, they create visual lines through the street, and they create shadows. As you walk or run the route, pay attention to where the barreras are, where the gaps are, and how they channel movement. This knowledge becomes instinctive by the time you are in the middle of the actual run.